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Imaging apparatus having image blur suppression function

a technology of image blur and apparatus, which is applied in the field of image blur suppression function of imaging apparatus, can solve problems such as assembling error factor, assembling error factor, and hall element error factor

Inactive Publication Date: 2010-04-13
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides an imaging apparatus that can prevent image blurring caused by various error factors such as variations in position detection device output values, assembly errors between the magnet and hall element, and installation position errors. The apparatus includes an image pick up device that moves to the reference position based on position detection information, and can detect the position of the image pick up device by using the stored reference positional information. This ensures that the image pick up device is always in the correct position, resulting in clear and stable images.

Problems solved by technology

By the way, when a hall element is used as the position detection element, there exists an assembling error factor regarding mechanical positional relationship between a magnet and the hall element at the time of assembling a camera.
Moreover, there exists an assembling error factor between the installation position of hall element relative to the mounting stage and the installation position of coil.
Furthermore, there exists an error factor related to the hall element that its specific output characteristic varies.
Thus, accurate control for suppressing an image blur can not be performed.

Method used

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  • Imaging apparatus having image blur suppression function
  • Imaging apparatus having image blur suppression function
  • Imaging apparatus having image blur suppression function

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embodiment

(General Structure of Digital Camera)

[0050]FIG. 1 is a front view illustrating a digital still camera (hereinafter, referred to as a camera) as an imaging apparatus according to the present invention, FIG. 2 is a back view thereof, FIG. 3 is a top view thereof, and FIG. 4 is a block circuit diagram illustrating a schematic system structure of the digital camera interior.

[0051]Referring to FIG. 1, a camera body has a top plane (the top plane when the subject side is the front plane) provided with a release switch (release shutter) SW1, a mode dial SW2, and a sub liquid crystal display (or sub LCD) 1 presented in FIG. 3.

[0052]The camera body has a front plane (subject side) provided with a lens barrel unit 7 including a photographing lens, an optical finder 4, a stroboscopic light emitting section 3, a ranging unit 5, and a remote control light receiving section 6.

[0053]The camera has a back plane (photographer's side), as illustrated in FIG. 2, provided with a power switch SW13, an L...

modification example

[0176]FIG. 25 is a circuit diagram illustrating a modification example of the feedback circuit 50. In this case, the processor 104 controls the driving of coil driver MD4 by means of PWM control (pulse width modulation control), so as to control the power distribution to the coils COL1″, COL2″ as shown in FIG. 25A.

[0177]More particularly, a normal direction rotation signal CON1 and a reverse direction rotation signal CON2 are input to the coil driver MD4, together with a pulse signal. The coil driver MD4 is driven by the voltages Vin1, Vin2 according to the pulse signal. In case of the normal direction rotation, the power distribution voltages to the coils COL1″, COL2″ increase as the energization time of high level of the pulse signal gets longer. In case of the reverse direction rotation, the power distribution voltages to the COL1″, COL2″ reduce as the energization time of high level of the pulse signal gets longer.

[0178]FIG. 25B shows a relationship between the energization time...

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Abstract

An imaging apparatus, including an image pick up device capable of moving in a transverse direction to a photographing optical axis, a drive circuit configured to prevent an image on the image pick up device from blurring or reduce the image blur by moving the image pick up device based on an amount of the image blur, a position detection device configured to detect a position of the image pick up device, a storing device configured to store reference positional information showing that the image pick up device is in the reference position based on an output of the position detection device, the position of the image pick up device being detected based on the reference positional information stored in the storing device when the image pick up device is driven by the drive circuit.

Description

CROSS-REFERENCE TO THE RELATED APPLICATIONS[0001]This application is based on and claims the priority benefit of each of Japanese Patent Application No. 2005-293992, filed on Oct. 6, 2005 and Japanese Patent Application No. 2006-272451, filed on Oct. 4, 2006, the contents of which are incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to an imaging apparatus having a function for suppressing an image blur, especially, to a control circuit thereof.[0004]2. Description of Related Art[0005]For an imaging apparatus having a function for suppressing an image blur, for example, a digital camera (camera), there has been known a structure which mounts a CCD as an image pick-up device onto a mounting stage so as to move the CCD relative to a photographing lens. With the above camera, vibrations in the yaw direction and the pitch direction are detected by using a camera shake detection sensor, the CCD is moved in the ...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): H04N5/228H04N23/40
CPCH04N5/23287H04N5/23248H04N23/68H04N23/687
Inventor SERIKAWA, YOSHIOIRISAWA, SHIGERU
Owner RICOH KK